Name: microbial layers inside a winogradsky column
Uploaded: 2026-03-12T13:57:35.000Z
Duration: 1 min 27 s
Channel: JoVE

위노그라드스키 기둥은 미생물 다양성과 대사를 연구하기 위한 자기조직화 인공 미생물 생태계입니다.유리 원통을 반쯤 유기물이 풍부한 퇴적물로 채워 건설합니다.파쇄된 종이는 탄소원으로, 석고는 황산염으로, 탄산칼슘은 완충제로 첨가됩니다.기둥은 물로 채워져 빛에 노출되어 있습니다.시간이 지남에 따라 컬럼 내에서 뚜렷한 미생물층이 형성되어 산소와 황 구배가 형성됩니다.상단에서는 남세균이 산소 광합성을 수행하며 산소를 생성하고 상부 영역을 호기성을 유지합니다.그 아래에서는 화학섬유질성 황 박테리아가 이 산소를 이용해 황화수소를 산화합니다.하부 무산소 구역에서는 보라색과 녹색 황 박테리아가 무산소 광합성을 수행하며, 황화수소를 이용해 이산화탄소를 고정합니다.더 깊은 무산소층에서는 황산염 환원제와 발효제와 같은 혐기성 박테리아가 황산염을 환원하여 황화수소로 환원시키고, 황산화 박테리아가 이를 이용해 수직 황 순환을 만듭니다.

비노그라드스키 기둥

The Winogradsky Column

위노그라드스키 컬럼은 층층이 분리된 자급자족 환경에서 미생물 생태와 대사 상호작용을 연구하는 강력한 도구를 제공합니다. 19세기 후반 세르게이 비노그라드스키가 개발한 이 인공 생태계는 자연 퇴적물에서 발견되는 복잡한 생지화학적 구배를 재현하여 연구자들이 미생물의 천이와 상호작용을 시간에 따라 관찰할 수 있게 합니다.이 기둥은 일반적으로 투명한 유리 원통에 반쯤 침전물이 셀룰로오스(예: 찢어진 종이), 탄산칼슘, 석고와 혼합된 침전물로 채워져 조립됩니다. 셀룰로오스는 탄소원으로, 탄산칼슘은 pH 완충 역할을 하며, 석고는 황산염을 공급합니다. 남은 공간은 연못 물로 채우고, 기둥은 증발과 오염을 막기 위해 밀봉됩니다. 그 후 빛 속에 놓아 광합성 활동을 촉진합니다. 몇 주 내에 산소와 황의 화학적 구배가 형성되어 뚜렷한 미생물 구역의 형성을 촉진합니다.가장 윗층은 빛과 산소에 노출되며, 시아노박테리아와 조류와 같은 산소 포광영양 생물이 우세합니다. 이 생물들은 빛 에너지를 이용해 이산화탄소를 고정하며, 부산물로 산소를 생성합니다. 바로 아래, 미세호기성대에서는 무색 황 박테리아가 제한된 산소를 이용해 황화수소(H₂S)를 산화하여 원소 황(S⁰) 또는 황산염(SO₄²⁻)을 형성합니다.기둥 깊숙이 들어가 산소가 고갈되는 곳에서는 보라색 비황 박테리아가 유기 기질과 빛에 의존해 성장을 촉진하는 광이영양소를 사용합니다. 더 깊은 곳, 엄격한 무산소 조건에서는 보라색과 녹색 유황 박테리아가 무산소 광합성을 수행합니다. 이 생물들은 H₂S를 전자 공여체로 사용하며 CO₂를 고정하여 산소가 없는 상태에서 1차 생산에 기여합니다.기둥 바닥에서는 황산염 환원 박테리아(예: Desulfovibrio spp.)와 발효제와 같은 혐기성 박테리아가 유기물을 분해합니다. 황산염 환원제는 황산염을 말단 전자 수용체로 사용하여 H₂S를 생성합니다. 이 H₂S는 위로 확산되어 상층에서 황산화 및 광합성 박테리아의 에너지원이 되어 폐쇄 고리 황 순환을 유지합니다.위노그라드스키 기둥은 층층화된 구조와 역동적인 상호작용을 통해 미생물 생태계의 복잡성과 상호 의존성을 보여주며, 환경 미생물학과 생지구화학적 순환에 대한 통찰력 있는 모델로 작용합니다.

A Winogradsky column provides a powerful tool for studying microbial ecology and metabolic interactions in a stratified, self-contained environment. This ...

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Education

교육

JoVE Core

Microbiology

미생물학

Unit

단위

Microbial Ecology

미생물 생태학

KEY TERMS AND CONCEPTS

주요 용어 및 개념

microbial layers inside a winogradsky column

A Winogradsky column shows how microbial layers form in a simple, sealed ecosystem. It is a clear model for studying microbial ecology and how different metabolisms interact in sediment over time.

The setup uses a transparent glass cylinder. Half of it is filled with sediment mixed with cellulose, such as shredded paper, calcium carbonate, and gypsum. The cellulose provides a carbon source. Calcium carbonate buffers pH, and gypsum supplies sulfate. The rest of the cylinder is filled with pond water, then sealed to limit evaporation and contamination.

The column is placed in light so photosynthesis can occur. Over several weeks, oxygen and sulfur gradients develop. These chemical changes create distinct microbial zones in the sediment and water column.

The top layer, which has both light and oxygen, is dominated by oxygenic phototrophs such as cyanobacteria and algae. These organisms use light to fix carbon dioxide and release oxygen as a byproduct. Just below that, in the microaerophilic zone, colorless sulfur bacteria use the small amount of oxygen available to oxidize hydrogen sulfide, or H2S. This process can produce elemental sulfur, S0, or sulfate, SO4(2−).

Deeper in the column, oxygen becomes scarce. Purple nonsulfur bacteria live here and use photoheterotrophy, which means they use light and organic substrates for growth. Still deeper, in fully anoxic zones, purple sulfur bacteria and green sulfur bacteria carry out anoxygenic photosynthesis. They use H2S as an electron donor and fix CO2 even without oxygen.

At the base of the column, anaerobic bacteria break down organic matter. Sulfate-reducing bacteria, such as Desulfovibrio species, use sulfate as a terminal electron acceptor and produce H2S. Fermenters also help decompose the material. The H2S moves upward and becomes fuel for sulfur-oxidizing and photosynthetic bacteria, which helps sustain a closed sulfur cycle in the column.

Microbial Layers Inside a Winogradsky Column

microbial-layers-inside-a-winogradsky-column

introduction to microbial ecology

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ecological niche

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methods to assess microbial communities

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Microbial communities include bacteria, archaea, and eukaryotic microorganisms. They live in many ecosystems and affect important environmental and biological processes. Scientists study these communities by looking at how many species are present, how many individuals each species has, and how evenly the species are spread out. Species richness is the number of different species in a sample. Species abundance is the relative amount of each species. Species evenness describes how uniformly the...

the winogradsky column

A Winogradsky column shows how microbial layers form in a simple, sealed ecosystem. It is a clear model for studying microbial ecology and how different metabolisms interact in sediment over time. The setup uses a transparent glass cylinder. Half of it is filled with sediment mixed with cellulose, such as shredded paper, calcium carbonate, and gypsum. The cellulose provides a carbon source. Calcium carbonate buffers pH, and gypsum supplies sulfate. The rest of the cylinder is filled with pond...

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Microorganisms live in tiny habitats called microenvironments. These spaces have their own physical and chemical conditions. Oxygen level, pH, temperature, light, and nutrient supply can all differ from the surrounding area. These local conditions strongly affect microbial growth, metabolism, and which species can live there. Microenvironments often have sharp gradients over very small distances. In soil, oxygen may be available at the particle surface but drop off just a few millimeters below.

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Microbial Competition and Niche Partitioning

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microbial interactions: parasitism

Microbial Parasites and Host Dependence

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microbe-plant interactions

How Plant Microbes Affect Growth

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microbes and the carbon cycle

How Microbes Move Carbon Through Earth

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How Microbes Produce Methane

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Microbial Steps in the Nitrogen Cycle

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key terms and concepts

Explore how a Winogradsky column forms distinct microbial layers, from oxygenic phototrophs at the top to sulfate reducers at the base.

Microbial Layers Inside a Winogradsky Column | JoVE K12

JoVE Core Microbiology provides an engaging introduction to the microbial world and its influence on health, industry, and the environment. This comprehensive collection covers key concepts such as microbial structure, metabolism, genetics, and ecology. It introduces essential laboratory techniques and microscopy methods through visually engaging animations. Corresponding scientist-in-action videos bridge classroom concepts with real-world research and applications.

microbiology

Microbial Layers Inside a Winogradsky Column

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